If the contact angle is 104 ∘ , what is the magnitude of the adhesive force between the particle and the surface?

Answer:

program explanation

Explanation:

program explanation

The set of activities having a long-term aim should be a program.

A program refers to a set of instructions that a computer follows in order to perform a specific task. At the time When you program a computer, you provide it a set of instructions to make it able to perform a particular task.

So here the program should be considered.

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To determine the position of the minute hand at 8:15 a.m., we can use the following approach:

Convert the time to radians: At 8:15 a.m., the minute hand is 75% of the way from the 8:00 a.m. mark to the 9:00 a.m. mark. Since the minute hand travels 360 degrees in 60 minutes, it travels 6 degrees per minute. Therefore, at 8:15 a.m., it has traveled 90 degrees from the 8:00 a.m. mark. This is equivalent to (90/360) x 2π radians = π/2 radians. Use trigonometry to determine the position: Since the minute hand is 3.00 cm long and pointing in the direction of the positive x-axis at 8:15 a.m., its position can be described by the coordinates (3.00 cos(π/2), 3.00 sin(π/2)) = (0, 3.00). Therefore, the minute hand is pointing straight up at 8:15 a.m. Note that the x-axis points in the same direction as the minute hand at 8:15 a.m., while the y-axis points in the same direction as the minute hand at 8:00 a.m. This means that the x-axis is perpendicular to the minute hand at 8:00 a.m., and the y-axis is perpendicular to the minute hand at 8:15 a.m.

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Given data

*The given initial volume of water is V_1 = 2 L

*The given initial temperature of the water is T_i = 20 °C

*The given final temperature of the water is T_f = 40 °C

*The coefficient of volumetric expansion of water is

The formula for the volumetric expansion is given as

Substitute the known values in the above expression as

Answer:

A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.

Explanation:

Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

The period is the time that elapses between the emission of two consecutive waves. In other words, it is the time it takes for a complete wave to pass a reference point. The period (T) is simply the inverse of the frequency (f):

\(T=\frac{1}{f}\)

In this case, f=5*10¹⁰ Hz. So, replacing in the definition of period T:

\(T=\frac{1}{5*10^{10} Hz }\)

Solving:

T= 2*10⁻¹¹ seconds

A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.

A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.

The fequency is defined as the number of cycles achieved by the any wave it is expressed in hertz.

Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

The period is the time that elapses between the emission of two consecutive waves. In other words, it is the time it takes for a complete wave to pass a reference point. The period (T) is simply the inverse of the frequency (f):

\(T=\dfrac{1}{f}\)

In this case, f=5*10¹⁰ Hz. So, replacing in the definition of period T:

\(T=\dfrac{1}{5\times 10^{10}}=2\times 10^{-11}\ Sec\)

A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.

Thus a microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.

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Answer:

Sulphur dioxide monoxide

Answer: 0.0180701 s

Explanation:

Given the following :

Length of string (L) = 10 m

Weight of string (W) = 0.32 N

Weight attached to lower end = 1kN = 1×10^3

Using the relation:

Time (t) = √ (weight of string * Length) / weight attached to lower end * acceleration due to gravity

g = acceleration due to gravity = 9.8m/s^2

Weight of string = 0.32N

Time(t) = √ (0.32 * 10) / [(1*10^3) * (9.8)]

Time = √3.2 / 9800

= √0.0003265

= 0.0180701s

(a) The average velocity of the ball is 22 m/s.

(b) The centripetal acceleration of the ball is 276.35 m/s².

The average velocity of the ball is calculated by applying the following formula.

v = ωr

where;

v = ( 120 rev/min x 2π rad/rev x 1 min/60s) x 1.75 m

v = 22 m/s

The centripetal acceleration of the ball is calculated as follows;

a = v² / r

a = ( 22² ) / 1.75

a = 276.35 m/s²

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Explanation:

'What is the magnitude of the force needed to stop the horses and bring the box into equilibrium?' ≈42N; according to the vectors rules.

'Where would you locate the rope to apply the force?' - in point D.

PS. zoom out the attached picture.

Answer:

c

Explanation:

An object's speed is the characteristic which is related to kinetic energy but not the potential energy. Thus, the correct option is C.

The kinetic energy of an object is the energy which it possesses due to the motion of the object. Kinetic energy is defined as the work which is needed to accelerate an object of a given mass from rest position to its stated velocity. Having gained this amount of energy during the acceleration of the object, the object maintains this kinetic energy unless its speed changes or it experiences acceleration.

Kinetic energy is directly proportional to the mass of the object and to the square of the velocity of the object, the expression is:

K.E. = 1/2 m × v²

where, KE = Kinetic energy,

m = mass of the object,

v = velocity of the object.

Therefore, the correct option is C.

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Answer:

about 5000 °F

Explanation:

Answer:

\(I_2=0.8586A\)

Explanation:

From the question we are told that:

Turns Ratio i.e\(\frac{N_2}{N_1}=\frac{1}{106} (step down)\)

Voltage \(v=170v\)

Primary current amplitude\(I_1= 8.10 mA =>8.10*10^{-3}A\)

Generally the equation for a Transformer is mathematically given by

\(\frac{E_1}{E_2}=\frac{I_2}{I_1}=\frac{N_1}{N_2}\)

Therefore

\(I_2=\frac{N_1}{N_2}*I_1\)

\(I_2=106*8.10*10^{-3}\)

\(I_2=0.8586A\)

Answer:

D

Explanation:

Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

Answer: D

Explanation:Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

The mass of a neutral atom of ₈O¹⁸ is approximately equal to the sum of the masses of 8 atoms of ₁H¹ and 10 neutrons.

Given that the nucleus of ₈O¹⁸ is formed by 8 protons and 10 neutrons.

₈O¹⁸ = 8 protons(p) + 10 neutrons(n)

The mass of an atom is defined as the sum of the nucleons of the atom.

Nucleons are the general word for protons and neutrons since they are both found in the nucleus. Nucleons are hence the scientific term for the subatomic particles found in the atom's nucleus.

So,

Mass of the neutral atom of ₈O¹⁸ = (8 x mp) + (10 x mn)

m(₈O¹⁸) = (8 x 1.007276u) + (10 x 1.008665u)

m(₈O¹⁸) = 8.058208 + 10.08665

m(₈O¹⁸) = 18.144858 u

Also,

Mass of 8 atoms of ₁H¹ = 8 x m(₁H¹)

Mass of 8 atoms of ₁H¹ = 8 x 1.007825u

Mass of 8 atoms of ₁H¹ = 8.0626 u

So,

Mass of 8 atoms of ₁H¹ + 10 mn = 8.0626 + 1.008665

M = 18.9291 u

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The voltage is 18 -j1.

Solution:

According to ohm's law:

V=IR

where v = voltage, i = current, r = resistance

current (I) = 3+j2

resistance (R) = 4-j3

So,

V=IXR

V = (3+j2)×(4−j3)

V = 18-j1

Voltage is the pressure from the power source in an electrical circuit that forces charged electrons through loops of conductors to do work, such as irradiate light. Voltage, also called electromotive force, is simply energy per unit charge. In other words, voltage is the potential difference between two points.

Current is the flow rate of charge. Voltage is defined as the amount of potential energy between two points in a circuit. Some points have more charge than others. The difference in charge between these two points is called voltage.

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Answer: Hand tools are necessary for daily activities.

Explanation:

The hand tools are useful for day to day activities they aid in pouring substances, holding things, mixing substances, cleaning and for other purposes. In a chemical laboratory the hand tools like test tube holders can help in holding the chemicals. In a medical laboratory the forceps can be useful in holding and cutting the sections without causing any harm to the hands. Hand tools avoid the direct contact with the microorganisms in medical laboratory thus protect against infections. Hand tools aid in surgical operations and they help in avoiding direct contact with the blood vessels and organs preventing contamination and infections.

Answer:C car

Explanation:

Answer:1. Using the following formula, we can calculate the kinetic energy of a 1500 kg tow-mapping truck moving at a speed of 31.0 m/s: KE is equal to 0.5 * m * v2, where m is the object's mass and v is its speed.

By entering the data, we obtain the following equation: KE = 0.5 * 1500 kg * (31.0 m/sec) * 2 = 0.5 * 1500 kg * 961 m2/sec * 2 = 723,500 J

Therefore, the 1500 kg Tow-Mater Truck's kinetic energy at 31.0 m/sec is 723,500 J.

2. To determine the height of the cliff, we use the formula: PE = mgh, where m is the mass of the base jumper, g is the acceleration due to gravity (9.8 m/s^2), and h is the height of the cliff.

Given that the base jumper has 16,800 J of potential energy, we can rearrange the formula to find h: h = PE / (m * g) = 16,800 J / (68.0 kg * 9.8 m/s^2) = 20.6 m

So, the base jumper is 20.6 meters above the base of the cliff.

Explanation:

Answer:

1.  

energy : KE = units J

mass: m = 1500m unit

velocity: v = 31v unit m/s

Answer:

KE = 720750 J

2.

energy: KE = 16800 KE unit

mass:  m = 68.0m unit

= V

Answer:

v = 22.228757209048 m/s

Answer:

Much of our understanding of the basic structure and composition of Earth and the other planets in our solar system is not strenuously debated. We can infer a surprising amount of information from the size, mass and moment of inertia of the planets, all of which can be determined from routine astronomical observations. Measurements of surface chemical composition, either by direct sampling (as has been done on Earth, the moon, and Mars) or through spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula. Remote observations of the gravitational field can be used to understand how a planet's mass is distributed, whereas the strength and shape of the magnetic field provides some constraint on the structure of a metallic core. The specifics of structure and composition, however, are much more debatable. And it is these details that tell us a much more extensive and ultimately more interesting story about the internal dynamics of the planets and their evolution. As a result, trying to determine them is frontier research in almost all fields of earth and planetary science.

Even on Earth, many of these details have to be inferred from remote observations. Because we cannot sample the deep Earth, we must deduce its composition either by looking at the clues hidden in igneous and metamorphic rocks, or by examining proxies for composition and structure such as the three-dimensional variation of the velocity of seismic waves produced by earthquakes and sampled by networks of seismometers on the surface. The late Francis Birch, the eminent Harvard geophysicist, and his colleagues and students worked out the basic methodology that brings these distinct observations together. Birch showed how the stiffness of rocks changes under the extreme conditions of pressure and temperature deep within planets, as well as with chemical composition. Because the speed of seismic waves depends on the stiffness of the medium through which they propagate, it is possible to calculate temperature and composition from maps of seismic velocity. Most current research is based on Birch's work and it has even been extended to the most extreme temperature and pressure conditions of Earth's core. For example, much of our understanding of the large- and small-scale convection patterns driving plate tectonics has come about by using Birch-type proxies for temperature and composition.

Explanation:

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If the value obtained by the lab group investigating the maximum weight students can lift with their arms compared to their legs is 20, it is unlikely that there is a difference between the arms and legs data. To determine if there is a significant difference between the maximum weight students can lift with their arms compared to their legs, statistical analysis should be performed.

If the value obtained is 20, it is important to calculate the p-value to determine the probability of obtaining this value due to chance. If the p-value is greater than the significance level (usually 0.05), then it can be concluded that there is no significant difference between the arms and legs data. However, if the p-value is less than the significance level, then it can be concluded that there is a significant difference between the arms and legs data.

In this case, the value obtained is 20, which indicates that the difference between the maximum weight students can lift with their arms compared to their legs is not very large. However, it is necessary to calculate the p-value to determine if this difference is statistically significant or not. If the p-value is greater than 0.05, then it is unlikely that there is a difference between the arms and legs data, and the conclusion would be that the difference is not statistically significant.

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Explanation:

As the source of sound waves approaches you the sound waves get closer together, increasing their frequency and the pitch of the sound. The opposite happens when the source of sound waves moves away from you

Answer:

Explanation:

Let the hot water run from the tap until it's piping hot, and then turn the jar on its side and carefully dip the lid under water. ... The hot water helps the metal expand, therefore loosening the lid and making it easier to unscrew.

Velocity of boat = 0.866 m/s

Solution Given:

Let the velocity of the boat = V m/s

Cos 30°=\( \frac{adjacent }{hypotenuse} =\frac{0.75}{V }\)

\( \frac{0.75}{V}\) = 0.8660

∴ V = \(\frac{0.75}{0.8660}\)

V = 0.866 m/s

If acceleration is present, both the system's and the individual objects' accelerations are the same. Usually, a system analysis is done to figure out the system's acceleration.

An individual object analysis is combined with the system analysis. Any one of the two items is isolated and treated as a distinct, independent entity in the individual object analysis. The forces operating on the item individually are recognized and computed using a free-body diagram. It is customary to analyze each object separately in order to calculate the magnitude of any force acting between the two. One of the two methods that is frequently used to evaluate two-body problems is the dual combination of a system analysis and an individual object analysis.

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StickK is a platform that helps consumers achieve their goals by making a commitment contract.

The commitment contract is a binding agreement where the consumer sets a goal and selects a referee to hold them accountable. If they don't reach the goal, they will have to pay a penalty fee that they set themselves at the start of the contract. StickK's key features include personalized goal setting, social support, and a penalty system that motivates the user to stay committed.

StickK makes money through its penalty fees and affiliate marketing. The company has a viable business model as it has a growing user base and positive user feedback. If StickK went after a B2B approach, they would need to tailor their platform to a company's goals and work with HR departments to make sure the commitment contract is effective.

The main barrier to success for StickK is the low adoption rate as people may be hesitant to commit to a contract and pay a penalty. To overcome this barrier, StickK could focus on marketing and expanding their user base by partnering with fitness or wellness companies.

it is already proven to be successful and there is still room for growth. StickK can continue to improve and refine its features to attract more users and expand its market reach.

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The plumb bob hangs vertically downwards when the railroad car is at rest. However, when the car moves in a circular track of radius 340 m at a speed of 94 km/h, it experiences a centrifugal force that pulls the plumb bob away from the vertical.

To find the angle relative to the vertical at which the plumb bob hangs, we need to use the formula:

tan(theta) = (v^2) / (g * r)

where:
theta = angle relative to the vertical
v = speed of the railroad car = 94 km/h = 26.11 m/s
g = acceleration due to gravity = 9.81 m/s^2
r = radius of the circular track = 340 m

Substituting the given values, we get:

tan(theta) = (26.11^2) / (9.81 * 340)
tan(theta) = 2.146

Taking the inverse tangent of both sides, we get:

theta = tan^-1(2.146)
theta = 64.7 degrees

Therefore, the plumb bob hangs at an angle of 64.7 degrees relative to the vertical when the railroad car rounds a circular track of radius 340 m at a speed of 94 km/h.

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Answer:

But if you place a clear container filled with hydrogen gas between the flashlight and the prism, gaps appear in the smooth rainbow of colors, places where the light literally goes missing. The dark absorption lines of a star at rest (left) get shifted towards red if the star is moving away from Earth (right)

Explanation: